#include <stdlib.h>

typedef struct dist_{
   
   int x;
   int y;
   int z;

} DIST;


int main(int h, int w){

   DIST **lut; // lookup table, 2D array of structures
   int x, y;
  
   ASSUME(h > 0);
   ASSUME(w > 0);
   
	lut = (DIST**)malloc(sizeof(DIST*)*h);
	lut[0] = (DIST*)malloc(sizeof(DIST)*h*w);
	for (y=0; y<h; y++)
		lut[y] = lut[0] + w*y;

    ASSERT(lut[0][h*w-1].x == lut[h-1][w-1].x);
    
    free(lut[0]);
    free(lut);
   
   return 1;
}
